If you have just purchased an Audi-100 (new or used), it will be better if you check the oil level at every refueling. If it becomes clear that the engine is consuming very little oil, then it will be possible to increase the monitoring interval to every second or even every fourth refueling:
- Stop on a horizontal platform.
- After turning off a preheated engine, wait at least another five minutes to allow the oil to drain into the sump. But more effective - before the first start of a still cold engine.
- You should be careful with a hot engine so as not to burn your hands.
- Pull out the dipstick (oil level gauge), wipe it with a clean, lint-free cloth or paper towel, reinsert it all the way, wait a while and pull it out again.
- At the tip of the dipstick you will see the oil level.
- If the amount of oil only reaches the lower mark, you need to add oil to the engine.
Topping up oil
The difference between the top and bottom marks on the dipstick is 1 liter. The oil level must not fall below the lower mark. If the oil is only a quarter of a liter less than necessary, then you can not be afraid for the engine yet. But if the oil level is even lower and the vehicle is being driven in an abrupt manner, the oil pressure can drop to a dangerous level, which is immediately indicated by the oil pressure warning buzzer.
Too much oil in the engine is also unwise. At high speeds, oil can enter through the crankcase ventilation system into the combustion chambers. For a catalytic converter, excess oil in the exhaust gases is just as dangerous as unused gasoline, as it can lead to breakdown. However, at a normal oil level, there is no such danger. At what level of oil it should be added depends on driving style.
With a moderate driving style, it will be enough to add oil when its level drops to the lower mark.
With a sharp driving style, adding oil is recommended if its level is in the lower third or quarter between both marks. More oil can perform better cooling functions.
Note: Small quantities of oil are more expensive than 3 or 5 liter cans. However, such canisters are usually not very convenient for adding oil on the road. In addition, they take up space in the trunk. For accurate dosing of oil, a one-liter canister with a screw cap is more suitable.
Can different types of oil be mixed?
Varieties of oil from all manufacturers can be safely mixed with each other, as well as seasonal oil with all-weather. This ability to mix without detrimental effects is a basic requirement of international standards for oils. Although the specific properties of a particular oil may change slightly when mixed with another engine oil, because each oil has its own combination of additives. However, such mixing does not have a threatening effect on the lubricating effect. Anyone who adheres to the oil standards specified by Audi need not fear that an unsuitable mixture will damage the engine.
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